resumo
There has been broad attention to the recognition and detection of ions and organic small molecules due to their essential roles in environmental systems. However, dual-functional probes have seldom been developed for sensing organic constituents and lanthanide ions. A new 3D pillared Zn(II)-organic framework [Zn-3(L)(DCTP)(3)](n) (1) (L = 1,4-di(1H-benzo[d]imidazol-2-yl)butane and H2DCTP = 2,5-dichloroterephthalic acid) was hydrothermally synthesized and structurally characterized, and features a unique 3D 4,4,4,6-connected framework containing approximately 9.99 x 9.78 angstrom(2) cubic channels. 1 displays excellent thermal and pH stability and can act as a novel turn-on fluorescent probe for highly selectively sensitizing Tb3+ ions through an antenna effect. Furthermore, 1 is a dual-response fluorescent sensor for monitoring acetylacetone and Tb3+ ions with rapid response times (within 1 min), low limits of detection (LOD) (5.02 x 10(-6)/1.15 x 10(-8) M, separately) and great anti-interference ability and recyclability towards the analytes. The related sensing mechanisms for detecting analytes are also investigated in detail.
palavras-chave
METAL-ORGANIC FRAMEWORKS; COORDINATION POLYMERS; CRYSTAL-STRUCTURES; FUNCTIONAL LUMINESCENT; CONTRAST AGENTS; LANTHANIDE; MOF; SENSOR; DIVERSITY; COMPLEXES
categoria
Chemistry, Inorganic & Nuclear
autores
Fu, MM; Fu, LS; Cui, GH
nossos autores
Lianshe Fu
Investigador AuxiliarProjectos
Nano-argilas para remoção/captura de fosfatos (P) e sua reutilização como fertilizante (NATURAL)
agradecimentos
This project was supported by the National Natural Science Foundation of China (51474086). This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Foundation for Science and Technology/MCTES.